^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (c) 2019 Hammerspace Inc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/kobject.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/nfs_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/rcupdate.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "nfs4_fs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "netns.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "sysfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct kobject *nfs_client_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static struct kset *nfs_client_kset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static void nfs_netns_object_release(struct kobject *kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) kfree(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static const struct kobj_ns_type_operations *nfs_netns_object_child_ns_type(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct kobject *kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) return &net_ns_type_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static struct kobj_type nfs_netns_object_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) .release = nfs_netns_object_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) .sysfs_ops = &kobj_sysfs_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) .child_ns_type = nfs_netns_object_child_ns_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static struct kobject *nfs_netns_object_alloc(const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct kset *kset, struct kobject *parent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) struct kobject *kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) kobj = kzalloc(sizeof(*kobj), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (kobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) kobj->kset = kset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) if (kobject_init_and_add(kobj, &nfs_netns_object_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) parent, "%s", name) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) kobject_put(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) int nfs_sysfs_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) nfs_client_kset = kset_create_and_add("nfs", NULL, fs_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (!nfs_client_kset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) nfs_client_kobj = nfs_netns_object_alloc("net", nfs_client_kset, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (!nfs_client_kobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) kset_unregister(nfs_client_kset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) nfs_client_kset = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) void nfs_sysfs_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) kobject_put(nfs_client_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) kset_unregister(nfs_client_kset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static ssize_t nfs_netns_identifier_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct kobj_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct nfs_netns_client *c = container_of(kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct nfs_netns_client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) kobject);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) ssize_t ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) ret = scnprintf(buf, PAGE_SIZE, "%s\n", rcu_dereference(c->identifier));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) /* Strip trailing '\n' */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static size_t nfs_string_strip(const char *c, size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) while (len > 0 && c[len-1] == '\n')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) --len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static ssize_t nfs_netns_identifier_store(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) struct kobj_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct nfs_netns_client *c = container_of(kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) struct nfs_netns_client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) kobject);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) const char *old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) char *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) size_t len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) len = nfs_string_strip(buf, min_t(size_t, count, CONTAINER_ID_MAXLEN));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (!len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) p = kmemdup_nul(buf, len, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (!p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) old = rcu_dereference_protected(xchg(&c->identifier, (char __rcu *)p), 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (old) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) synchronize_rcu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) kfree(old);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static void nfs_netns_client_release(struct kobject *kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) struct nfs_netns_client *c = container_of(kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) struct nfs_netns_client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) kobject);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) kfree(rcu_dereference_raw(c->identifier));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) kfree(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static const void *nfs_netns_client_namespace(struct kobject *kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return container_of(kobj, struct nfs_netns_client, kobject)->net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static struct kobj_attribute nfs_netns_client_id = __ATTR(identifier,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 0644, nfs_netns_identifier_show, nfs_netns_identifier_store);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static struct attribute *nfs_netns_client_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) &nfs_netns_client_id.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static struct kobj_type nfs_netns_client_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) .release = nfs_netns_client_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) .default_attrs = nfs_netns_client_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) .sysfs_ops = &kobj_sysfs_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) .namespace = nfs_netns_client_namespace,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) static struct nfs_netns_client *nfs_netns_client_alloc(struct kobject *parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct nfs_netns_client *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) p = kzalloc(sizeof(*p), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (p) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) p->net = net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) p->kobject.kset = nfs_client_kset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) if (kobject_init_and_add(&p->kobject, &nfs_netns_client_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) parent, "nfs_client") == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) kobject_put(&p->kobject);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) void nfs_netns_sysfs_setup(struct nfs_net *netns, struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) struct nfs_netns_client *clp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) clp = nfs_netns_client_alloc(nfs_client_kobj, net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (clp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) netns->nfs_client = clp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) kobject_uevent(&clp->kobject, KOBJ_ADD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) void nfs_netns_sysfs_destroy(struct nfs_net *netns)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) struct nfs_netns_client *clp = netns->nfs_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (clp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) kobject_uevent(&clp->kobject, KOBJ_REMOVE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) kobject_del(&clp->kobject);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) kobject_put(&clp->kobject);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) netns->nfs_client = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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